Catch rear left — a genuine BMW part, number 52 20 7 152 242. The number stamped on the part is 52207152242; BMW's catalog files it under the short number 7152242. You will find it on our Interior Body shelf, under Seatbelts. BMW has since replaced it with 8267019.
It fits the E46 touring (323i and 325i, 2000–2005), with the M52, M54 or M56 engines — and the European-market versions.
BMW draws it on the Seat, rear, seat frame, left (52_2547) diagram. It weighs about 260 g (0.6 lb).
We have not had one on the shelf yet. Request it and we will tell you when one comes off a car.